<template>
  <!--为echarts准备一个具备大小的容器dom-->
  <div id="emain" ref="emain" style="width: 100%; height: 400px"></div>
</template>
<script>
import { totaldata } from '@/api/order';
import echarts from 'echarts'
export default {
  name: 'emdchart',
  data () {
    return {
      charts: '',
    }
  },
  methods: {
    async getData () {
      let res = await totaldata()
      let { xData, amountData, orderData } = res.data
      this.drawPie(xData, amountData, orderData)
    },
    drawPie () {
      this.charts = echarts.init(this.$refs.emain)
      this.charts.setOption({
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            crossStyle: {
              color: '#999'
            }
          }
        },
        toolbox: {
          feature: {
            dataView: { show: true, readOnly: false },
            magicType: { show: true, type: ['line', 'bar'] },
            restore: { show: true },
            saveAsImage: { show: true }
          }
        },
        legend: {
          data: ['Evaporation', 'Precipitation', 'Temperature']
        },
        xAxis: [
          {
            type: 'category',
            data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
            axisPointer: {
              type: 'shadow'
            }
          }
        ],
        yAxis: [
          {
            type: 'value',
            name: 'Precipitation',
            min: 0,
            max: 250,
            interval: 50,
            axisLabel: {
              formatter: '{value} ml'
            }
          },
          {
            type: 'value',
            name: 'Temperature',
            min: 0,
            max: 25,
            interval: 5,
            axisLabel: {
              formatter: '{value} °C'
            }
          }
        ],
        series: [
          {
            name: 'Evaporation',
            type: 'bar',
            data: [
              2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3
            ]
          },
          {
            name: 'Precipitation',
            type: 'bar',
            data: [
              2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0, 2.3
            ]
          },
          {
            name: 'Temperature',
            type: 'line',
            yAxisIndex: 1,
            data: [2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2]
          }
        ]
      })
      window.addEventListener('resize', this.charts.resize)
    },
  },
  //调用
  created () {
    this.getData();
  },
  beforeDestroy () {
    window.removeEventListener('resize', this.charts.resize);
  },
}
</script>
<style scoped>
* {
  margin: 0;
  padding: 0;
  list-style: none;
}
</style>
